Photo taken on Nov. 18, 2007 shows the exterior of the National Stadium, nicknamed "Bird's Nest", in Beijing, capital of China. The three structural works of the National Stadium, reinforced concrete structure, steel structure and membrane structure completed recently. The stadium, a main venue for the Beijing 2008 Olympic Games, is expected to be completed next March. (Xinhua Photo)

Photo taken on Nov. 18, 2007 shows the exterior of the National Stadium, nicknamed "Bird's Nest," in Beijing, capital of China. The three structural works of the National Stadium, reinforced concrete structure, steel structure and membrane structure completed recently. The stadium, a main venue for the Beijing 2008 Olympic Games, is expected to be completed next March.(Xinhua Photo) Photo taken on Nov. 18, 2007 shows the interior of the National Stadium, nicknamed "Bird's Nest," in Beijing, capital of China. The three structural works of the National Stadium, reinforced concrete structure, steel structure and membrane structure completed recently. The stadium, a main venue for the Beijing 2008 Olympic Games, is expected to be completed next March.(Xinhua Photo)